Bug 215277 - Enabling EFI runtime services causes panics in the T2 security chip on Macs equipped with it
Summary: Enabling EFI runtime services causes panics in the T2 security chip on Macs e...
Status: RESOLVED CODE_FIX
Alias: None
Product: EFI
Classification: Unclassified
Component: Services (show other bugs)
Hardware: x86-64 Linux
: P1 high
Assignee: EFI Virtual User
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2021-12-09 05:48 UTC by gargaditya08
Modified: 2022-01-12 11:01 UTC (History)
2 users (show)

See Also:
Kernel Version: 5.15.7
Subsystem:
Regression: No
Bisected commit-id:

Attachments
Proposed patch by Ard Biesheuvel fixes the issue (674 bytes, patch)
2022-01-12 10:59 UTC, gargaditya08 		Details | Diff
Add an attachment (proposed patch, testcase, etc.)

Description gargaditya08 2021-12-09 05:48:29 UTC 
On enabling EFI runtime services on Macs with the T2 security chip, kernel fails to boot due panics in the T2 security chip. Using efi=noruntine (or noefi) as a kernel parameter seems to fix the issue. Also, making NVRAM read-only makes kernels boot.
Comment 1 gargaditya08 2022-01-12 10:59:08 UTC 
Created attachment 300256 [details]
Proposed patch by Ard Biesheuvel fixes the issue

Proposed patch by Ard Biesheuvel fixes the issue
Note You need to log in before you can comment on or make changes to this bug.